7.92% is the change from 770 to 831
Calculation steps:
[( 831 - 770 ) ÷ 770] x 100 = 7.92%
Formula
Percentage change = [(831 - 770) / 770] x 100
Subtract the new number by the original number
831 - 770 = 61
61 ÷ 770 = 0.07922077922077922
0.07922077922077922 x 100 = 7.92%